Grating



April 10, 1928. 1365.846

H. DENNI GRATING Filed July -5. 1927 fl A9 INVENTQR 0/1/1 m j-haATTORNEY Patented Apr. 10, 1928.

UNITED STATES PATENT OFFICE.

HARRY DENNI, OF KANSAS CITY, MISSOURI.

GRATING.

Application filed July 5, 1927. Serial No. 203,395.

My invention relates to improvements in gratings. One of the ob ects ofmy invention is to provide a novel grating having a practically nonskidupper surface so as to ste s.

if further object of my invention is to provide a grating step the frontedge of which will be readily distinguishable to any one coming down thestairs and viewing the step from above. \Vith the usual types of ingsused for stairways. it is difficult for any one coming down the steps toeasily distinguish the front edges thereof, particularly when thegrating steps have air and light passages through them. Such inabilityto distinguish from the other bars the bar which forms the front edge ofthe step has resulted many times in persons becoming confused and injuryto them has resulted due to falls occasioned by such cause.

With my improvement such accidents may be eliminated or greatly reducedin number.

My invention provides further a novel grating which is simple, cheap,strong, durable, not likely to get out of order, and which may be usedfor the usual purposes of gratings.

The novel features of my invention are hereinafter fully described andclaimed.

In the accompanying drawing which illustrates my invention,

Fig. l is a perspective view of a grating embodying the preferred formof my invention.

Fig. 2 is an end elevation of the same.

Fig. 3 is a section on the line 3-3 of Fig. 1.

Fig. 4 is an end elevation of a modified form of my invention.

Fig. 5 is a cross section of what is shown in Fig. 4.

Similar reference characters designate similar parts in the differentviews.

Referring to Figs. 1 to 3, 1 designates two horizontal parallel sidebars disposed edge up, and having fastened to their inner sidesrespectively the ends of two transverse end bars 2, and also the ends oftwo intermediate transverse bars 3, the bars 2 and 3 being disposed edgeup, and the bars 3 having each in their upper edges V shaped notches tin which are respectively fitted V shaped chan nel bars 5 which arefastened in any suitable manner as by welding to the bars 3 and to theupper edges of the bars 2.

The upper edges of the bars 3 and the upper edges of the bars 5 are,preferably, in the same plane as the upper edges of the bars 1.

By reason of this the channel bars 5 are well braced and a strongstructure is afforded.

The channel bars 5 are spaced apart, preferably, shown so as to formpassages which extend through the grating, and which permit the passageof light and air therethrough.

The channel bars 5 are disposed with their concave sides up. Thisenables the flanges of the channel bars to afford foot holds to keep ashoe from slipping thereon, which would not be afforded by a smoothunbroken surface. To further eliminate liability of slipping thereon,the channel bars 5 may be filled with a material having a nonskid uppersurface, such as tar or asphalt 6 the top portion 7 of which may becoated or mixed with sand or cinders.

WVhile other forms of channel bars than the V form may be advantageouslyused for the purpose described, I pefer the V form,

as requiring the least material for the width of channel, and as alsorequiring the least material being out out of the upper edges of thebars 3 to make the notches for receiving the channel bars. Also the formrequires the least filling material 6 for the surface exposed. However,other forms of channel bars, such as channel bars 8, Figs. 4 and 5, maybe used. These channel bars are bars having the usual U form with theflanges at right angles to the base. In such a structure the transversebars 9, corresponding in function and location to the bars 3, areprovided with notches in the upper edges thereof in which the channelbars 8 are fitted and secured as by welding.

The bars 8 may be filled with the filling nonskid material, the same ashas been described with reference to the material 6 haw ing the uppernonskid surface 7.

To enable any one going down stairs having steps, comprising gratings,such as are shown in the drawings, to readily distinguish the front edgeof each step from the bars adjacent thereto, and thus avoid confusionand possible falling, the rear side 1 of the front side bar 1, whichforms the front edge of the step, is colored, as by being till paintedwhite, the visible portions of the adj acent bars of the grating step,and those of the one next below, being of a darker color. Thus onecoming down the stairs will see the white rear side 1 of the front sidebarof the step, and will thus know and see the front edge of each stepas he proceeds downwardly, the light color of the frontbars readilydistinguishing them from the adja cent ones. v v i I do Ilfit llllllt myinvention to the struc' tures shown and described, as manymodifications, within the scope of the appended claims, may be madewithout departing from the spirit oi my invention.

lVhat I claim is l. A grating having two sidebars,jtransverse barssupported by said side bars, one

of said transverse bars having transverse notches in its upper edge, andchannel bars mounted concave sides up on said transverse bars andrespectively in said. notches with their upper edges in the plane ofthe-upper edges of said side bars.

2. A grating having two side bars transverse bars supported thereby, oneof said transverse bars having transverse notches in its upper edge, andchanne bars mounted concave sides upon said transverse bars andrespectively in said notches with their upper edges in the plane of theupper edges of said side bars, and spaced apart to form between thempassages extending through said grat ing.

3. A grating having two side bars, transverse bars supported thereby,one of said transverse bars having transverse V shaped notches in itsupper edge, and V shaped channel bars mounted concave sides up on saidtransverse bars and respectively fitted in said notches with their upperedges in the plane of the upper edges of the side bars.

4. A grating having two side bars, transverse bars supported thereby,one of said transverse bars having transverse V shaped notches in itsupper edge, and V shaped channel bars-mounted concave sides up on saidtransverse bars and respectively fitted in said notches with their upperedges in the plane of the upper edges of said side bars, and spacedapart to form between them passages extendingthrough said grating.

5. A grating having two side bars, transverse bars supported thereby,one of said transverse bars having transverse notches in its upper edge,and channel bars mounted concave sides up on said transverse bars andrespectively in said notches, the upper edges of said transverse barsand the upper edge of the notched bar being in the plane of the upperedges of said side bars.

6. A grating having two side bars, transverse bars supported thereby,one of said transverse bars having transverse notches in its upper edge,channel bars mounted concave sides up on said transverse bars andrespectively in said notches, the upper edges of said channel bars beingin the plane of the upper edges of said side bars, and material fillingsaid channel bars and having a nonslrid upper surface.

7. A grating having two side bars, transverse bars supported thereby,one of Said transverse bars having transverse notches in its upper edge,channel bars mounted concave sides up on said transverse bars andrespectively in said notches with their upper edges in the plane of theupper edges of said side bars, and spaced apart to form between thempassages extending through said grating, and material filling saidchannel bars and having a nonskid upper surface.

8. A grating having two side bars, transverse bars supported thereby,one of said transverse bars having V shaped notches in its upper edge, Vshaped channel bars mounted concave sides up on said transverse bars andrespectively fitted in said notches with their upper edges in the planeof the upper edges of said side bars, and spaced apart to form betweenthem passages extending through the grating, and material filling saidchannnel bars and having a nonskid upper surface.

In testimony whereof I have signed my name to this specification.

HARRY DENNI.

